Rotary engine.



N0. 748,495. PATENTED DB0. 29, 1903. J. GARY. ROTARY ENGINE.V

APPLICATION FILED JUNE 26, 1901. BBNBWED JUNE 3. 1903.

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N5. 748,495. EATENTED DEG. 29, 1903. J. GARY.

ROTARY ENGINE.

APPLIUATION FILED JUNE 2s. 1901. EENEWED JUNE s. 1909. No MODEL. zSHEETS-SHEET 2.

"U NITED "STATES Patented December 29, 1903.

PATENT OFFICE.

JEFFERSON GARY, OF ST. LOUIS, MISSOURI, ASSIGNOR OF SIX-SEVENTHS TOGEORGE W. BOLDREW, PHINEAS SMITH, WILLIS BARNETT, HENRY H. JONES,HAMILTON SMITH, AND GEORGE W. BROWN, OF ST. LOUIS,

MISSOURI.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 748,495, dated December29, 1903.

Application led June 26, 1901. Renewed June 3, 1903. Serial No.1591979.(No model.)

To LZZ whom it may concern:

Be it known that I, JEFFERSON GARY, acitizen of the United States,residing at St. Louis, State of Missouri, have invented certain new anduseful Improvements in Rotary Engines,

of which the following is a full, clear, and eX- act description,reference being had to the accompanying drawings, forming a part hereof.

My invention has relation to improvements Io in rotary engines; and itconsists in the novel arrangement and combination of parts more fullyset forth in the specification and pointed out in the claims.

In the drawings, Figure l is a combined cross-section and elevation ofthe engine, showing the valve-pipe fully retracted. Fig.

. 2 is a similar view showing the valve-pipe discharging the motor iiuidto the first series of ports formed in the piston-disk. Fig. 3 is zo anedge View of the piston-disk detached. Fig. 4c is an end elevation ofthe engine.V Fig.

5 is a plan of one side of the piston-disk. Fig. 6 is a combined sectionand elevation of one series of pockets formed on the inner face of oneof the walls of the cylinder lor casing, and Fig. 7 is a similar view ofthe pockets of the opposite wall of the casing.

The object of my invention is to construct a rotary engine which shallbe characterized 3o by a maximum com pactness, lightness, minimum numberof parts, and maximum durability. g

A further object is to construct an engine which shall be under perfectcontrol and 3 5 readily reversible and one possessing further and otheradvantages better apparent from a detailed description thereof, which isas follows:

Referring to the drawings, C C' represent,

4o respectively, the front and rear Walls of the casing or cylinderwhose periphery is formed by the circular cover-plate C. Disposed,

respectively, along the inner faces of the walls C C' are annular bandsl l', along whose inner peripheral walls are disposed a series ofpockets 2 2', respectively, each pocket having a terminal wall disposedin the line of the radius of the band and an-inclined basal wall, (seeFigs. 6 and 7,) the pockets in the band 1 tending in one direction,while those of the opposite band tend in the opposite direction. (SeeFigs. 6, 7.) Between the adjacent faces of the bands l 1' is adapted torevolve the central annular peripheral rib 3 of the rotary piston 3',the bands 1 l' embracingbthe periphery of the piston on each side ofsaid central rib 3. By this arrangement the periphery of the piston oneach side ofthe central rib 3 is encompassed by the open ends of theseries of pockets formed in the respective bands.

Projecting from one face of the piston 3' and forming an integral parttherewith is a central stud or shaft 3", to which the drivepulley 4 isdirectly coupled and whence the power may be transmitted to anydesirable machinery, (not shown,) there being a short boss 3"' on theopposite face.. Formed in the piston opposite the base of the stud 3"and extending to within a suitable distance of the face from which thestud projects is a central passage 5, with which communicate the annularsteam-distributing chambers 6 6', respectively, said chambers beingdisposed exteriorly to the planes of the opposite faces of the rib 3.Leading from substantially diametrically opposite points of the chamber6 and passing entirely through the diameter of the piston are the curvedports 7 7, whose outer ends open at the periphery of the piston on oneside of the rib 3, a similar series of ports 7' 7' leading from thechamber 6' and opening at the periphery of the piston on the oppositeside of the rib 3. The only difference between the disposition of theports 7 7 is that while the outer ends of the ports 7 are directed todischarge the motor fluid tangentially in one direction from theperiphery of the piston to cause said duid to impinge against theterminal Walls of one set of pockets 2 the outer ends of the ports 7'discharge the motor-fluid in the opposite direction to cause the same toimpinge against the terminal walls of the opposite set of pockets 2',(which, as previously stated, tend in the opposite direction from thepockets 2.) It may be stated in passing (and before describing thedetails by which steam is admitted to the ports 7 7) that the steam orother motor fluid I pipe S inwardly into the passage 5 and bringas thesame is discharged from the ports 7 7 l ing the openings 10`opposite oneorthe other at the periphery of the piston, and as it impinges againstthe pockets 2 2', the force of the jet thus discharged will drive thepiston in the opposite direction to that in which the jet is escaping,so that if steam is allowed to pass through the ports 7 and impingeagainst the pockets 2 the piston will rotate in one direction, while ifthe steam is fed to the ports 7 the piston will travel in the reversedirection. After the jet has performed its work the exhaust or spentsteam will escape through the exhaust pipes or ports 8 8', suchexhauststeam iinding vent or escape through the space formed between theadjacent faces of the piston and walls C C', such space being formed bydividing the opposite faces of the piston into four quadrants a c b b,(a a b b,) two opposite ones of which a a (0, ct) shall have their facesincline gradually from the center of the piston to the faces of theremaining pair b b b' 19') to a depth indicated by the ledges 9 9. Theledges 9 gather, as it were, the exhaust-steam occluded between theinclined faces of the quadrants d a and the adjacent face of the wall Cand gradually force it out of the exhaust-pipe 8. Owing to the reverserotation imparted to the piston when steam is fed through the ports 7",it is obvious that the ledges 9 shall tend in the opposite direction tothe ledges 9 to effectively force the exhaust-steam through the pipe 8.

The feed mechanism or valve by which the steam is conducted to theopening 5 and distributing-chambers 6 6 is as follows: The feed end ofthe steam-pipe S has operating therein a sliding extension or valve-pipeS', closed at its inner end, adjacent to which, however, it is providedwith a series of peripheral perforations or discharge-openings 10. Whenthese openings are opposite the chamber 6, the steam will be fed to theports 7, and when opposite the chamber 6' the steam will be fed to ports7 with results as already described, and when the pipe S' is withdrawnto bring the openings 10 in line with the wall C the feed will be cutoffentirely and the engine remain stationary. This longitudinal movement ofthe pipe S to its various positions is accomplished as follows:Projecting from the wall C of the casing is a bracket or arm 11, havinga terminal loop 12 loosely encircling the pipe S. Loosely rotatableabout the pipe S and located adjacent the loop 12 is a reversing-disk13, provided with a lever or arm 14, the said disk 13 having an inclinedface cooperating with an inclined face of a second disk 15, keyed to thepipe S'. Interposed between the wall C and the adjacent face of the disk15 are springs 16, whose tendency is to normally force the pipe S'outwardly. By rocking the disk 13 in either direction it will cause theinclined faces to ride over one another, this action forcing the disk 15and of the chambers 6 6' and permit the discharge of the steam thereintoand the ports 7 or 7 and rotate the piston in one direction or theother. To insure against any possible rotation of the pipe S during itslongitudinal movement, I provide the disk 15 with a lug 15', which isconstrained and guided between two parallel arms 17, projecting from thebracket 11, (one of the arms being removed in Fig. 1.) The disk 15 willthus under all circumstances be forced to advance longitudinally uponrotation of the reversingdisk in the proper direction. To cut off thesteam, the lever 14 is rocked in the reverse direction, permitting thespring 16 to forcel the pipe S outwardly sufcien tly to bring theperforations 10 opposite the wall C. (See Fig. 1.)

Having described my invention, what I claim is- 1. In a rotary engine, asuitable casing or cylinder, an annular band disposed along each of theinner adjacent faces of the opposite walls thereof, a piston confinedbetween the walls of the casing and having its periphery embraced by theannular bands, two series of ports formed in the piston and dischargingperipherally therefrom, one in one direction, and the other in theopposite direction, pockets formed along the inner circle of each ofsaid annular bands, and having abutting walls against which the motoriiuid can impinge, the one set of pockets tending in one direction andthe other set in the opposite direction, suitable exhaustports formed inthewalls of the casing, and means for feeding the motor fluidindependently to one or the other set or series of ports, the partsoperating substantially as, and for the purpose set forth.

2. In a rotary engine, a suitable piston-disk having a centralperipheral rib, a central feed-opening being formed on one face of thedisk, annular steam-distributing chambers disposed in planes on eachside of the rib, ports leading from said chambers and discharging fromthe periphery thereof, those from one chamber in one direction, andthose leading from the other chamber discharging in the oppositedirection, the opposite faces of the disk having two opposite segmentsor quadrants with faces inclined to the plane of face of the disk andforming a tapering shoulder or ledge, whereby a space is formed betweensaid inclined faces and the adjacent wall of the cylinder for the escapeof the exhaust, substantially asset forth.

3. In a rotary engine, a rotatable piston having a central feed-opening,and ports leading therefrom to the periphery thereof, a steam-pipe, amovable valve-pipe carried by the steam-pipe, the inner end of thevalvepipe being closed but having feed ports or openings for discharginginto the ports afore- IOO IIO

said, a bracket having a loop embracing the of the cylinder, the partsoperating substan- Io Valve-pipe, a reversing-disk loosely rotataltially as and for the purpose set forth.

ble about the valve-pipe, a second disk keyed In testimony whereof Iaflx my signature to said valve-pipe, the tWo disks having inin presenceof two witnesses.

5 clined faces adapted to ride over one another, means for guiding thedisk keyed to JEFFERSON GARY' the valve-pipe and preventing accidentalro- Witnesses: tation thereof, and springs interposed be- EMIL STAREK,

tween the disk keyed to the pipe and the wall I G. L. BELFRY.

